这段代码的目标是运行四个线程，它将打开四个文本文件，从中读取单词，然后将它们放入字符串数组，
我知道的主要问题：
1-我没有将并发函数放在void run函数中，我希望能够将参数传递到该函数中
2-我不确定是否正在修改字符串的全局数组
首先是主要方法：

public static void main(String[] args) throws IOException 
    {
         //declare the threads
         Thread thread1 =  new Thread(ReadFile("list1.txt", Global.array1,"thread1"));
         Thread thread2 =  new Thread(ReadFile("list2.txt", Global.array2,"thread2"));
         Thread thread3 =  new Thread(ReadFile("list3.txt", Global.array3,"thread1"));
         Thread thread4 =  new Thread(ReadFile("list4.txt", Global.array4,"thread2"));

         /*error message from netbeans: cannot find symbol
            symbol:   method ReadFile(java.lang.String,java.lang.String[])

            it says it for every delcaration of the thread*/

         thread1.start();  //putting the threads to work
         thread2.start();
         thread3.start();
         thread4.start();

         thread1.join();   //telling the threads to finish their work
         thread2.join();
         thread3.join();
         thread4.join();

         // merging the arrays into one
         List list = new ArrayList(Arrays.asList(Global.array1));
         list.addAll(Arrays.asList(Global.array2));
         list.addAll(Arrays.asList(Global.array3));
         list.addAll(Arrays.asList(Global.array4));
         Object[] theArray = list.toArray();

           -------------------------etc----------------------------

如果我的声音是对的，这就是“线程类”

public class ReadFile implements Runnable
{
    public void run(){
            //I should get stuff here, that's my problem!!!!
    }

    private String path;
    Thread runner;

    public ReadFile(String filePath, String[] toArray, String threadName) throws IOException
    {
        String path = filePath;
        FileReader fr = new FileReader(path);
        BufferedReader textReader = new BufferedReader(fr);

        int numOfLines = readLines();  
        toArray = new String[numOfLines];

        int i;
        for (i=0; i<numOfLines; i++)
        {
            toArray[i]= textReader.readLine();    //place next line into string array
        }

        textReader.close();
    }

   int readLines() throws IOException
    {
        FileReader fr = new FileReader(filePath);
        BufferedReader bf = new BufferedReader(fr);

        String aLine;
        int noOfLines = 0;

        while((aLine = bf.readLine()) != null)
        {
            noOfLines++;
        }
        bf.close();
        return noOfLines;
    }

    }

最后我为全局变量做了一个类，我不知道这是不是个好主意

public class Global 
{
    public static String[] array1;
    public static String[] array2;
    public static String[] array3;
    public static String[] array4;
}

请让我知道你们的想法，任何帮助或解释或提示将不胜感激